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Eddy Flux Measurements, Pleistocene Park, Cherskii, Russia - 2008

Abstract:

In contribution to the Arctic Observing Network (AON), the researchers have established two observatories of landscape-level carbon, water and energy balances at Imnaviat Creek, Alaska and at Pleistocene Park near Cherskii, Russia. These will form part of a network of obervatories with Abisko (Sweden), Zackenburg (Greenland) and a location in the Canadian High Arctic which will provide further data points as part of the International Polar Year. This particular part of the project focuses on simultaneous measurements of carbon, water and energy fluxes of the terrestrial landscape at hourly, daily, seasonal and multi-year time scales. These are the major regulatory drivers of the Arctic climate system and form key linkages and feedbacks between the land surface, the atmosphere and the oceans.
In support of these objectives, a new 32m tower was deployed in Pleistocene Park, about 20km south of NESS. This station is currently measuring fluxes of carbon dioxide, methane, water vapor and energy in addition to other meteorological variables.

Contact:

Keywords:

Arctic LTER keywords:

Date Range:

Friday, August 22, 2008 to Thursday, December 31, 2009

Publication Date:

Friday, December 12, 2008

Methods:

Similar to the other flux stations involved in the AON project, the Pleistocene Park Station generates two types of data: high frequency eddy covariance (EC) data and low frequency means of meteorological and subsurface data. On a daily basis, approximately 75Mb of high frequency binary data and 16Kb of low frequency ASCII data is collected.

This station uses a CR3000 data logger and a laptop to collect and store data. The CR3000 is used to measure the open-path EC equipment which is sampled at 10Hz. Micrometeorological data is scanned at 0.33Hz and all data points are averaged every half hour. The CRBASIC program that controls the data logger has been written in such a way that only the most basic corrections and filtering are applied to the raw data. These would include shifting the CSAT3 and LI7500 data arrays by 2 and 3 scans respectively to account for the inherent processing delays of these sensors. The high frequency data is processed to yield mass and energy fluxes using a Reynold's decomposition after which the following corrections are applied: the WPL correction, a coordinate rotation, a spectral correction and the 'Burba' correction. Further quality controls flags are generated such as a stationarity test and a foot print analysis.The high frequency processed tables are then combined with the low frequency micrometeorological data after which the data is both filtered and gap-filled. The following procedures are used to filter the data:1) Parameters that are based on the engineering specifications of each instrument. This normally involves filtering data based on the operating temperature range.2) Parameters that are based on the Automatic Gain Control of the LI7500 (AGC - lens transmissivity flag). If this value exceeds a given threshold, the lens of the LI7500 is assumed to be obstructed by ice or snow. All measurements from this sensor and all radiation sensors are then assumed to be similarly obstructed and this data is filtered.3) Any sources of air flow distortion are identified at each site and all EC measurements from those azimuth directions are filtered. Thus, if any wind that originates between these wind rejection angles, then this EC data is filtered out. 4) Parameters for impossible measurements (i.e. negative values from a precipitation gauge or pyranometer.)5) Parameters for previously flagged data including '-9999'. Data loggers or other processed datasets for which raw data isn't available will sometimes have various flag strings in use. This will standardize everything to 'NaN'.6) A three-standard deviation filter to get rid of extreme outliers.7) A similarity/cluster filter - With certain instruments, the appearance of a string of identical values in a time series usually indicates measurement errors. Any time series with clusters of 5 identical values are filtered.The following procedures are used to gap-till the data:1) A Pth order autoregressive model. Two values for each missing element in a time series are predicted with a forward-looking model and a back-looking model. This function is currently looking 168 elements in both directions in a time series and both predictions are averaged to produce a final estimate. This model is still capable of producing impossible values (i.e. negative measurements from a pyranometer) which are filtered out - thus, there may still be gaps in the time series, but they will be minimized. 2) Filtered values from the beginning and end ranges of a time series are predicted using a variant of the MDV method wherein values are estimated using binned half-hourly averages from the following or the previous seven days.
See the file CH_2044_Metadata_2008.csv for data collection statistics.

Variable Details

(Variables names are in the first line/row of the CSV file and Excel data sheet.)

Year

Label: Year

Definition: Year

Type: Date/time

Date format: YYYY

Missing values: None specified

DOY

Label: DOY

Definition: Day of Year

Type: Physical quantity

Unit: number

Maximum: Not specified

Minimum: Not specified

Precision: Not specified

Missing values: None specified

Month

Label: Month

Definition: Month

Type: Date/time

Date format: MM

Missing values: None specified

DOM

Label: DOM

Definition: Day of Month

Type: Date/time

Date format: DD

Missing values: None specified

HHMM

Label: HHMM

Definition: Hour/Minute

Type: Date/time

Date format: HHMM

Missing values: None specified

Timestamp

Label: Timestamp

Definition: CRBASIC Timestamp

Type: Date/time

Date format: YYYY-MM-DD HH:MM

Missing values: None specified

RECORD

Label: RECORD

Definition: Internal number for measurements

Type: Physical quantity

Unit: dimensionless

Maximum: Not specified

Minimum: Not specified

Precision: Not specified

Missing values: None specified

BATTVOLT_Avg

Label: BATTVOLT_Avg

Definition: Battery Voltage (mean)

Type: Physical quantity

Unit: volt

Maximum: Not specified

Minimum: Not specified

Precision: Not specified

Missing values:

NaN = Missing or Not Measured

BATTVOLT_Min

Label: BATTVOLT_Min

Definition: Battery Voltage (minimum)

Type: Physical quantity

Unit: volt

Maximum: Not specified

Minimum: Not specified

Precision: Not specified

Missing values:

NaN = Missing or Not Measured

TPANEL

Label: TPANEL

Definition: Panel Temperature

Type: Physical quantity

Unit: celsius

Maximum: Not specified

Minimum: Not specified

Precision: Not specified

Missing values:

NaN = Missing or Not Measured

n_Tot

Label: n_Tot

Definition: Number of high frequency samples recorded

Type: Physical quantity

Unit: number

Maximum: Not specified

Minimum: Not specified

Precision: Not specified

Missing values:

NaN = Missing or Not Measured

csat_warnings

Label: csat_warnings

Definition: Number of warning flags from CSAT3

Type: Physical quantity

Unit: number

Maximum: Not specified

Minimum: Not specified

Precision: Not specified

Missing values:

NaN = Missing or Not Measured

irga_warnings

Label: irga_warnings

Definition: Number of warning flags from LI7500

Type: Physical quantity

Unit: number

Maximum: Not specified

Minimum: Not specified

Precision: Not specified

Missing values:

NaN = Missing or Not Measured

del_T_f

Label: del_T_f

Definition: Delta temperature warning flag

Type: Physical quantity

Unit: number

Maximum: Not specified

Minimum: Not specified

Precision: Not specified

Missing values:

NaN = Missing or Not Measured

sig_lck_f_Tot

Label: sig_lck_f_Tot

Definition: Poor signal lock warning flag

Type: Physical quantity

Unit: number

Maximum: Not specified

Minimum: Not specified

Precision: Not specified

Missing values:

NaN = Missing or Not Measured

amp_h_f_Tot

Label: amp_h_f_Tot

Definition: Amplitude high warning flag

Type: Physical quantity

Unit: number

Maximum: Not specified

Minimum: Not specified

Precision: Not specified

Missing values:

NaN = Missing or Not Measured

amp_l_f_Tot

Label: amp_l_f_Tot

Definition: Amplitude low warning flag

Type: Physical quantity

Unit: number

Maximum: Not specified

Minimum: Not specified

Precision: Not specified

Missing values:

NaN = Missing or Not Measured

chopper_f_Tot

Label: chopper_f_Tot

Definition: Chopper warning flag

Type: Physical quantity

Unit: number

Maximum: Not specified

Minimum: Not specified

Precision: Not specified

Missing values:

NaN = Missing or Not Measured

detector_f_Tot

Label: detector_f_Tot

Definition: Detector warning flag

Type: Physical quantity

Unit: number

Maximum: Not specified

Minimum: Not specified

Precision: Not specified

Missing values:

NaN = Missing or Not Measured

pll_f_Tot

Label: pll_f_Tot

Definition: PLL warning flag

Type: Physical quantity

Unit: number

Maximum: Not specified

Minimum: Not specified

Precision: Not specified

Missing values:

NaN = Missing or Not Measured

sync_f_Tot

Label: sync_f_Tot

Definition: Synchronization flag

Type: Physical quantity

Unit: number

Maximum: Not specified

Minimum: Not specified

Precision: Not specified

Missing values:

NaN = Missing or Not Measured

agc_Avg

Label: agc_Avg

Definition: Automatic gain control

Type: Physical quantity

Unit: dimensionless

Maximum: Not specified

Minimum: Not specified

Precision: Not specified

Missing values:

NaN = Missing or Not Measured

C_spike

Label: C_spike

Definition: CO2 spikes recorded

Type: Physical quantity

Unit: number

Maximum: Not specified

Minimum: Not specified

Precision: Not specified

Missing values:

NaN = Missing or Not Measured

Q_spike

Label: Q_spike

Definition: H2O spikes recorded

Type: Physical quantity

Unit: number

Maximum: Not specified

Minimum: Not specified

Precision: Not specified

Missing values:

NaN = Missing or Not Measured

U_spike

Label: U_spike

Definition: Horizontal wind speed spikes recorded

Type: Physical quantity

Unit: number

Maximum: Not specified

Minimum: Not specified

Precision: Not specified

Missing values:

NaN = Missing or Not Measured

V_spike

Label: V_spike

Definition: Lateral wind speed spikes recorded

Type: Physical quantity

Unit: number

Maximum: Not specified

Minimum: Not specified

Precision: Not specified

Missing values:

NaN = Missing or Not Measured

W_spike

Label: W_spike

Definition: Vertical wind speed spikes recorded

Type: Physical quantity

Unit: number

Maximum: Not specified

Minimum: Not specified

Precision: Not specified

Missing values:

NaN = Missing or Not Measured

T_spike

Label: T_spike

Definition: Air temperature spikes recorded

Type: Physical quantity

Unit: number

Maximum: Not specified

Minimum: Not specified

Precision: Not specified

Missing values:

NaN = Missing or Not Measured

irga_error

Label: irga_error

Definition: Percentage bad flags recorded from LI7500

Type: Physical quantity

Unit: percent

Maximum: Not specified

Minimum: Not specified

Precision: Not specified

Missing values:

NaN = Missing or Not Measured

csat_error

Label: csat_error

Definition: Percentage bad flags recorded from CSAT3

Type: Physical quantity

Unit: percent

Maximum: Not specified

Minimum: Not specified

Precision: Not specified

Missing values:

NaN = Missing or Not Measured

C_stationarity

Label: C_stationarity

Definition: Statistical stationarity of CO2 channel

Type: Physical quantity

Unit: dimensionless

Maximum: Not specified

Minimum: Not specified

Precision: Not specified

Missing values:

NaN = Missing or Not Measured

Q_stationarity

Label: Q_stationarity

Definition: Statistical stationarity of H2O channel

Type: Physical quantity

Unit: dimensionless

Maximum: Not specified

Minimum: Not specified

Precision: Not specified

Missing values:

NaN = Missing or Not Measured

T_stationarity

Label: T_stationarity

Definition: Statistical stationarity of air temperature channel

Type: Physical quantity

Unit: dimensionless

Maximum: Not specified

Minimum: Not specified

Precision: Not specified

Missing values:

NaN = Missing or Not Measured

sdv

Label: sdv

Definition: Standard deviation of lateral wind speed

Type: Physical quantity

Unit: dimensionless

Maximum: Not specified

Minimum: Not specified

Precision: Not specified

Missing values:

NaN = Missing or Not Measured

footp

Label: footp

Definition: Footprint probability

Type: Physical quantity

Unit: percent

Maximum: Not specified

Minimum: Not specified

Precision: Not specified

Missing values:

NaN = Missing or Not Measured

EBC

Label: EBC

Definition: Energy Balance Closure

Type: Physical quantity

Unit: percent

Maximum: Not specified

Minimum: Not specified

Precision: Not specified

Missing values:

NaN = Missing or Not Measured

Ta_1

Label: Ta_1

Definition: Ambient air temperature

Type: Physical quantity

Unit: celsius

Maximum: Not specified

Minimum: Not specified

Precision: Not specified

Missing values:

NaN = Missing or Not Measured

Ta_1_f

Label: Ta_1_f

Definition: Ta_1 filtered

Type: Physical quantity

Unit: celsius

Maximum: Not specified

Minimum: Not specified

Precision: Not specified

Missing values:

NaN = Missing or Not Measured

Ta_1_gf

Label: Ta_1_gf

Definition: Ta_1 gap-filled

Type: Physical quantity

Unit: celsius

Maximum: Not specified

Minimum: Not specified

Precision: Not specified

Missing values:

NaN = Missing or Not Measured

PA_1

Label: PA_1

Definition: Atmospheric pressure tendency

Type: Physical quantity

Unit: kilopascal

Maximum: Not specified

Minimum: Not specified

Precision: Not specified

Missing values:

NaN = Missing or Not Measured

VP_1

Label: VP_1

Definition: Vapor pressure

Type: Physical quantity

Unit: kilopascal

Maximum: Not specified

Minimum: Not specified

Precision: Not specified

Missing values:

NaN = Missing or Not Measured

VP_1_f

Label: VP_1_f

Definition: VP_1 filtered

Type: Physical quantity

Unit: kilopascal

Maximum: Not specified

Minimum: Not specified

Precision: Not specified

Missing values:

NaN = Missing or Not Measured

VP_1_gf

Label: VP_1_gf

Definition: VP_1 gap-filled

Type: Physical quantity

Unit: kilopascal

Maximum: Not specified

Minimum: Not specified

Precision: Not specified

Missing values:

NaN = Missing or Not Measured

VPD

Label: VPD

Definition: Vapor pressure deficit

Type: Physical quantity

Unit: kilopascal

Maximum: Not specified

Minimum: Not specified

Precision: Not specified

Missing values:

NaN = Missing or Not Measured

VPD_f

Label: VPD_f

Definition: VPD filtered

Type: Physical quantity

Unit: kilopascal

Maximum: Not specified

Minimum: Not specified

Precision: Not specified

Missing values:

NaN = Missing or Not Measured

VPD_gf

Label: VPD_gf

Definition: VPD gap-filled

Type: Physical quantity

Unit: kilopascal

Maximum: Not specified

Minimum: Not specified

Precision: Not specified

Missing values:

NaN = Missing or Not Measured

Rh

Label: Rh

Definition: Relative humidity

Type: Physical quantity

Unit: percent

Maximum: Not specified

Minimum: Not specified

Precision: Not specified

Missing values:

NaN = Missing or Not Measured

Rh_f

Label: Rh_f

Definition: Rh filtered

Type: Physical quantity

Unit: percent

Maximum: Not specified

Minimum: Not specified

Precision: Not specified

Missing values:

NaN = Missing or Not Measured

Rh_gf

Label: Rh_gf

Definition: Rh gap-filled

Type: Physical quantity

Unit: percent

Maximum: Not specified

Minimum: Not specified

Precision: Not specified

Missing values:

NaN = Missing or Not Measured

CO2_1

Label: CO2_1

Definition: CO2 concentration

Type: Physical quantity

Unit: micromolePerMole

Maximum: Not specified

Minimum: Not specified

Precision: Not specified

Missing values:

NaN = Missing or Not Measured

CO2_1_f

Label: CO2_1_f

Definition: CO2_1 filtered

Type: Physical quantity

Unit: micromolePerMole

Maximum: Not specified

Minimum: Not specified

Precision: Not specified

Missing values:

NaN = Missing or Not Measured

CO2_1_gf

Label: CO2_1_gf

Definition: CO2 _1 gap-filled

Type: Physical quantity

Unit: micromolePerMole

Maximum: Not specified

Minimum: Not specified

Precision: Not specified

Missing values:

NaN = Missing or Not Measured

H2O_1

Label: H2O_1

Definition: H2O density

Type: Physical quantity

Unit: gramPerMeterCubed

Maximum: Not specified

Minimum: Not specified

Precision: Not specified

Missing values:

NaN = Missing or Not Measured

H2O_1_f

Label: H2O_1_f

Definition: H2O_1 filtered

Type: Physical quantity

Unit: gramPerMeterCubed

Maximum: Not specified

Minimum: Not specified

Precision: Not specified

Missing values:

NaN = Missing or Not Measured

H2O_1_gf

Label: H2O_1_gf

Definition: H2O_1 gap-filled

Type: Physical quantity

Unit: gramPerMeterCubed

Maximum: Not specified

Minimum: Not specified

Precision: Not specified

Missing values:

NaN = Missing or Not Measured

Rg

Label: Rg

Definition: Incoming short wave radiation

Type: Physical quantity

Unit: wattPerMeterSquared

Maximum: Not specified

Minimum: Not specified

Precision: Not specified

Missing values:

NaN = Missing or Not Measured

Rg_f

Label: Rg_f

Definition: Rg filtered

Type: Physical quantity

Unit: wattPerMeterSquared

Maximum: Not specified

Minimum: Not specified

Precision: Not specified

Missing values:

NaN = Missing or Not Measured

Rg_gf

Label: Rg_gf

Definition: Rg gap-filled

Type: Physical quantity

Unit: wattPerMeterSquared

Maximum: Not specified

Minimum: Not specified

Precision: Not specified

Missing values:

NaN = Missing or Not Measured

Rg_out

Label: Rg_out

Definition: Outgoing short wave radiation

Type: Physical quantity

Unit: wattPerMeterSquared

Maximum: Not specified

Minimum: Not specified

Precision: Not specified

Missing values:

NaN = Missing or Not Measured

Rg_out_f

Label: Rg_out_f

Definition: Rg_out filtered

Type: Physical quantity

Unit: wattPerMeterSquared

Maximum: Not specified

Minimum: Not specified

Precision: Not specified

Missing values:

NaN = Missing or Not Measured

Rg_out_gf

Label: Rg_out_gf

Definition: Rg gap-filled

Type: Physical quantity

Unit: wattPerMeterSquared

Maximum: Not specified

Minimum: Not specified

Precision: Not specified

Missing values:

NaN = Missing or Not Measured

Rl

Label: Rl

Definition: Incoming long wave radiation

Type: Physical quantity

Unit: wattPerMeterSquared

Maximum: Not specified

Minimum: Not specified

Precision: Not specified

Missing values:

NaN = Missing or Not Measured

Rl_f

Label: Rl_f

Definition: Rl filtered

Type: Physical quantity

Unit: wattPerMeterSquared

Maximum: Not specified

Minimum: Not specified

Precision: Not specified

Missing values:

NaN = Missing or Not Measured

Rl_gf

Label: Rl_gf

Definition: Rl gap-filled

Type: Physical quantity

Unit: wattPerMeterSquared

Maximum: Not specified

Minimum: Not specified

Precision: Not specified

Missing values:

NaN = Missing or Not Measured

Rl_out

Label: Rl_out

Definition: Outgoing long wave radiation

Type: Physical quantity

Unit: wattPerMeterSquared

Maximum: Not specified

Minimum: Not specified

Precision: Not specified

Missing values:

NaN = Missing or Not Measured

Rl_out_f

Label: Rl_out_f

Definition: Rl_out filtered

Type: Physical quantity

Unit: wattPerMeterSquared

Maximum: Not specified

Minimum: Not specified

Precision: Not specified

Missing values:

NaN = Missing or Not Measured

Rl_out_gf

Label: Rl_out_gf

Definition: Rl_out gap-filled

Type: Physical quantity

Unit: wattPerMeterSquared

Maximum: Not specified

Minimum: Not specified

Precision: Not specified

Missing values:

NaN = Missing or Not Measured

ALBEDO

Label: ALBEDO

Definition: Albedo

Type: Physical quantity

Unit: dimensionless

Maximum: Not specified

Minimum: Not specified

Precision: Not specified

Missing values:

NaN = Missing or Not Measured

ALBEDO_f

Label: ALBEDO_f

Definition: ALBEDO filtered

Type: Physical quantity

Unit: dimensionless

Maximum: Not specified

Minimum: Not specified

Precision: Not specified

Missing values:

NaN = Missing or Not Measured

RNET

Label: RNET

Definition: Net radiation

Type: Physical quantity

Unit: wattPerMeterSquared

Maximum: Not specified

Minimum: Not specified

Precision: Not specified

Missing values:

NaN = Missing or Not Measured

RNET_f

Label: RNET_f

Definition: RNET filtered

Type: Physical quantity

Unit: wattPerMeterSquared

Maximum: Not specified

Minimum: Not specified

Precision: Not specified

Missing values:

NaN = Missing or Not Measured

RNET_gf

Label: RNET_gf

Definition: RNET gap-filled

Type: Physical quantity

Unit: wattPerMeterSquared

Maximum: Not specified

Minimum: Not specified

Precision: Not specified

Missing values:

NaN = Missing or Not Measured

PAR

Label: PAR

Definition: Incoming photosynthetically active radiation

Type: Physical quantity

Unit: micromolePerMeterSquaredPerSecond

Maximum: Not specified

Minimum: Not specified

Precision: Not specified

Missing values:

NaN = Missing or Not Measured

PAR_f

Label: PAR_f

Definition: PAR filtered

Type: Physical quantity

Unit: micromolePerMeterSquaredPerSecond

Maximum: Not specified

Minimum: Not specified

Precision: Not specified

Missing values:

NaN = Missing or Not Measured

PAR_gf

Label: PAR_gf

Definition: PAR gap-filled

Type: Physical quantity

Unit: micromolePerMeterSquaredPerSecond

Maximum: Not specified

Minimum: Not specified

Precision: Not specified

Missing values:

NaN = Missing or Not Measured

PAR_totflx_Tot

Label: PAR_totflx_Tot

Definition: Cumulative incoming PAR for the 30 min interval

Type: Physical quantity

Unit: millimolePerMeterSquared

Maximum: Not specified

Minimum: Not specified

Precision: Not specified

Missing values:

NaN = Missing or Not Measured

PAR_out

Label: PAR_out

Definition: Reflected photosynthetically active radiation

Type: Physical quantity

Unit: micromolePerMeterSquaredPerSecond

Maximum: Not specified

Minimum: Not specified

Precision: Not specified

Missing values:

NaN = Missing or Not Measured

PAR_out_f

Label: PAR_out_f

Definition: PAR_out filtered

Type: Physical quantity

Unit: micromolePerMeterSquaredPerSecond

Maximum: Not specified

Minimum: Not specified

Precision: Not specified

Missing values:

NaN = Missing or Not Measured

PAR_out_gf

Label: PAR_out_gf

Definition: PAR_out gap-filled

Type: Physical quantity

Unit: micromolePerMeterSquaredPerSecond

Maximum: Not specified

Minimum: Not specified

Precision: Not specified

Missing values:

NaN = Missing or Not Measured

PAR_out_totflx_Tot

Label: PAR_out_totflx_Tot

Definition: Cumulative reflected PAR for the 30 min interval

Type: Physical quantity

Unit: millimolePerMeterSquared

Maximum: Not specified

Minimum: Not specified

Precision: Not specified

Missing values:

NaN = Missing or Not Measured

PRECIP

Label: PRECIP

Definition: Rainfall

Type: Physical quantity

Unit: millimeter

Maximum: Not specified

Minimum: Not specified

Precision: Not specified

Missing values:

NaN = Missing or Not Measured

PRECIP_f

Label: PRECIP_f

Definition: Rainfall filtered

Type: Physical quantity

Unit: millimeter

Maximum: Not specified

Minimum: Not specified

Precision: Not specified

Missing values:

NaN = Missing or Not Measured

SNOWD

Label: SNOWD

Definition: Snow depth

Type: Physical quantity

Unit: meter

Maximum: Not specified

Minimum: Not specified

Precision: Not specified

Missing values:

NaN = Missing or Not Measured

SNOWD_f

Label: SNOWD_f

Definition: SNOWD filtered

Type: Physical quantity

Unit: meter

Maximum: Not specified

Minimum: Not specified

Precision: Not specified

Missing values:

NaN = Missing or Not Measured

SNOWD_gf

Label: SNOWD_gf

Definition: SNOWD gap-filled

Type: Physical quantity

Unit: meter

Maximum: Not specified

Minimum: Not specified

Precision: Not specified

Missing values:

NaN = Missing or Not Measured

signal_quality

Label: signal_quality

Definition: Diagnostic flag

Type: Physical quantity

Unit: dimensionless

Maximum: Not specified

Minimum: Not specified

Precision: Not specified

Missing values:

NaN = Missing or Not Measured

G1

Label: G1

Definition: Ground heat flux

Type: Physical quantity

Unit: wattPerMeterSquared

Maximum: Not specified

Minimum: Not specified

Precision: Not specified

Missing values:

NaN = Missing or Not Measured

G1_f

Label: G1_f

Definition: G1 filtered

Type: Physical quantity

Unit: wattPerMeterSquared

Maximum: Not specified

Minimum: Not specified

Precision: Not specified

Missing values:

NaN = Missing or Not Measured

G1_gf

Label: G1_gf

Definition: G1 gap-filled

Type: Physical quantity

Unit: wattPerMeterSquared

Maximum: Not specified

Minimum: Not specified

Precision: Not specified

Missing values:

NaN = Missing or Not Measured

G2

Label: G2

Definition: Ground heat flux

Type: Physical quantity

Unit: wattPerMeterSquared

Maximum: Not specified

Minimum: Not specified

Precision: Not specified

Missing values:

NaN = Missing or Not Measured

G2_f

Label: G2_f

Definition: G2 filtered

Type: Physical quantity

Unit: wattPerMeterSquared

Maximum: Not specified

Minimum: Not specified

Precision: Not specified

Missing values:

NaN = Missing or Not Measured

G2_gf

Label: G2_gf

Definition: G2 gap-filled

Type: Physical quantity

Unit: wattPerMeterSquared

Maximum: Not specified

Minimum: Not specified

Precision: Not specified

Missing values:

NaN = Missing or Not Measured

G3

Label: G3

Definition: Ground heat flux

Type: Physical quantity

Unit: wattPerMeterSquared

Maximum: Not specified

Minimum: Not specified

Precision: Not specified

Missing values:

NaN = Missing or Not Measured

G3_f

Label: G3_f

Definition: G3 filtered

Type: Physical quantity

Unit: wattPerMeterSquared

Maximum: Not specified

Minimum: Not specified

Precision: Not specified

Missing values:

NaN = Missing or Not Measured

G3_gf

Label: G3_gf

Definition: G3 gap-filled

Type: Physical quantity

Unit: wattPerMeterSquared

Maximum: Not specified

Minimum: Not specified

Precision: Not specified

Missing values:

NaN = Missing or Not Measured

G4

Label: G4

Definition: Ground heat flux

Type: Physical quantity

Unit: wattPerMeterSquared

Maximum: Not specified

Minimum: Not specified

Precision: Not specified

Missing values:

NaN = Missing or Not Measured

G4_f

Label: G4_f

Definition: G4 filtered

Type: Physical quantity

Unit: wattPerMeterSquared

Maximum: Not specified

Minimum: Not specified

Precision: Not specified

Missing values:

NaN = Missing or Not Measured

G4_gf

Label: G4_gf

Definition: G4 gap-filled

Type: Physical quantity

Unit: wattPerMeterSquared

Maximum: Not specified

Minimum: Not specified

Precision: Not specified

Missing values:

NaN = Missing or Not Measured

SWC_1

Label: SWC_1

Definition: Volumetric soil water content

Type: Physical quantity

Unit: meterCubedPerMeterCubed

Maximum: Not specified

Minimum: Not specified

Precision: Not specified

Missing values:

NaN = Missing or Not Measured

SWC_1_f

Label: SWC_1_f

Definition: SWC_1 filtered

Type: Physical quantity

Unit: meterCubedPerMeterCubed

Maximum: Not specified

Minimum: Not specified

Precision: Not specified

Missing values:

NaN = Missing or Not Measured

SWC_1_gf

Label: SWC_1_gf

Definition: SWC_1 gap-filled

Type: Physical quantity

Unit: meterCubedPerMeterCubed

Maximum: Not specified

Minimum: Not specified

Precision: Not specified

Missing values:

NaN = Missing or Not Measured

SWC_2

Label: SWC_2

Definition: Volumetric soil water content

Type: Physical quantity

Unit: meterCubedPerMeterCubed

Maximum: Not specified

Minimum: Not specified

Precision: Not specified

Missing values:

NaN = Missing or Not Measured

SWC_2_f

Label: SWC_2_f

Definition: SWC_2 filtered

Type: Physical quantity

Unit: meterCubedPerMeterCubed

Maximum: Not specified

Minimum: Not specified

Precision: Not specified

Missing values:

NaN = Missing or Not Measured

SWC_2_gf

Label: SWC_2_gf

Definition: SWC_2 gap-filled

Type: Physical quantity

Unit: meterCubedPerMeterCubed

Maximum: Not specified

Minimum: Not specified

Precision: Not specified

Missing values:

NaN = Missing or Not Measured

TSOIL_1

Label: TSOIL_1

Definition: Soil temperature

Type: Physical quantity

Unit: celsius

Maximum: Not specified

Minimum: Not specified

Precision: Not specified

Missing values:

NaN = Missing or Not Measured

TSOIL_1_f

Label: TSOIL_1_f

Definition: TSOIL_1 filtered

Type: Physical quantity

Unit: celsius

Maximum: Not specified

Minimum: Not specified

Precision: Not specified

Missing values:

NaN = Missing or Not Measured

TSOIL_1_gf

Label: TSOIL_1_gf

Definition: TSOIL_1 gap-filled

Type: Physical quantity

Unit: celsius

Maximum: Not specified

Minimum: Not specified

Precision: Not specified

Missing values:

NaN = Missing or Not Measured

TSOIL_2

Label: TSOIL_2

Definition: Soil temperature

Type: Physical quantity

Unit: celsius

Maximum: Not specified

Minimum: Not specified

Precision: Not specified

Missing values:

NaN = Missing or Not Measured

TSOIL_2_f

Label: TSOIL_2_f

Definition: TSOIL_2 filtered

Type: Physical quantity

Unit: celsius

Maximum: Not specified

Minimum: Not specified

Precision: Not specified

Missing values:

NaN = Missing or Not Measured

TSOIL_2_gf

Label: TSOIL_2_gf

Definition: TSOIL_2 gap-filled

Type: Physical quantity

Unit: celsius

Maximum: Not specified

Minimum: Not specified

Precision: Not specified

Missing values:

NaN = Missing or Not Measured

TSURF

Label: TSURF

Definition: Surface temperature

Type: Physical quantity

Unit: celsius

Maximum: Not specified

Minimum: Not specified

Precision: Not specified

Missing values:

NaN = Missing or Not Measured

TSURF_f

Label: TSURF_f

Definition: TSURF filtered

Type: Physical quantity

Unit: celsius

Maximum: Not specified

Minimum: Not specified

Precision: Not specified

Missing values:

NaN = Missing or Not Measured

TSURF_gf

Label: TSURF_gf

Definition: TSURF gap-filled

Type: Physical quantity

Unit: celsius

Maximum: Not specified

Minimum: Not specified

Precision: Not specified

Missing values:

NaN = Missing or Not Measured

WS_1

Label: WS_1

Definition: Wind speed

Type: Physical quantity

Unit: meterPerSecond

Maximum: Not specified

Minimum: Not specified

Precision: Not specified

Missing values:

NaN = Missing or Not Measured

WS_1_f

Label: WS_1_f

Definition: WS_1 filtered

Type: Physical quantity

Unit: meterPerSecond

Maximum: Not specified

Minimum: Not specified

Precision: Not specified

Missing values:

NaN = Missing or Not Measured

WD_1

Label: WD_1

Definition: Wind direction

Type: Physical quantity

Unit: degree

Maximum: Not specified

Minimum: Not specified

Precision: Not specified

Missing values:

NaN = Missing or Not Measured

WD_1_f

Label: WD_1_f

Definition: WD_1 filtered

Type: Physical quantity

Unit: degree

Maximum: Not specified

Minimum: Not specified

Precision: Not specified

Missing values:

NaN = Missing or Not Measured

WD_1_gf

Label: WD_1_gf

Definition: WD_1 gap-filled

Type: Physical quantity

Unit: degree

Maximum: Not specified

Minimum: Not specified

Precision: Not specified

Missing values:

NaN = Missing or Not Measured

Solar_elevation

Label: Solar_elevation

Definition: Solar elevation

Type: Physical quantity

Unit: degree

Maximum: Not specified

Minimum: Not specified

Precision: Not specified

Missing values:

NaN = Missing or Not Measured

PA

Label: PA

Definition: Atmospheric pressure tendency

Type: Physical quantity

Unit: kilopascal

Maximum: Not specified

Minimum: Not specified

Precision: Not specified

Missing values:

NaN = Missing or Not Measured

WS

Label: WS

Definition: Wind speed

Type: Physical quantity

Unit: meterPerSecond

Maximum: Not specified

Minimum: Not specified

Precision: Not specified

Missing values:

NaN = Missing or Not Measured

WS_f

Label: WS_f

Definition: Wind speed filtered

Type: Physical quantity

Unit: meterPerSecond

Maximum: Not specified

Minimum: Not specified

Precision: Not specified

Missing values:

NaN = Missing or Not Measured

WS_gf

Label: WS_gf

Definition: Wind speed gap-filled

Type: Physical quantity

Unit: meterPerSecond

Maximum: Not specified

Minimum: Not specified

Precision: Not specified

Missing values:

NaN = Missing or Not Measured

WD

Label: WD

Definition: Wind direction

Type: Physical quantity

Unit: degree

Maximum: Not specified

Minimum: Not specified

Precision: Not specified

Missing values:

NaN = Missing or Not Measured

WD_f

Label: WD_f

Definition: WD filtered

Type: Physical quantity

Unit: degree

Maximum: Not specified

Minimum: Not specified

Precision: Not specified

Missing values:

NaN = Missing or Not Measured

WD_gf

Label: WD_gf

Definition: WD gap-filled

Type: Physical quantity

Unit: degree

Maximum: Not specified

Minimum: Not specified

Precision: Not specified

Missing values:

NaN = Missing or Not Measured

Ta

Label: Ta

Definition: Ambient air temperature

Type: Physical quantity

Unit: celsius

Maximum: Not specified

Minimum: Not specified

Precision: Not specified

Missing values:

NaN = Missing or Not Measured

Ta_f

Label: Ta_f

Definition: Ta filtered

Type: Physical quantity

Unit: celsius

Maximum: Not specified

Minimum: Not specified

Precision: Not specified

Missing values:

NaN = Missing or Not Measured

Ta_gf

Label: Ta_gf

Definition: Ta gap-filled

Type: Physical quantity

Unit: celsius

Maximum: Not specified

Minimum: Not specified

Precision: Not specified

Missing values:

NaN = Missing or Not Measured

VP

Label: VP

Definition: Vapor pressure

Type: Physical quantity

Unit: kilopascal

Maximum: Not specified

Minimum: Not specified

Precision: Not specified

Missing values:

NaN = Missing or Not Measured

VP_f

Label: VP_f

Definition: VP filtered

Type: Physical quantity

Unit: kilopascal

Maximum: Not specified

Minimum: Not specified

Precision: Not specified

Missing values:

NaN = Missing or Not Measured

VP_gf

Label: VP_gf

Definition: VP gap-filled

Type: Physical quantity

Unit: kilopascal

Maximum: Not specified

Minimum: Not specified

Precision: Not specified

Missing values:

NaN = Missing or Not Measured

CO2

Label: CO2

Definition: CO2 density

Type: Physical quantity

Unit: millimolePerMeterCubed

Maximum: Not specified

Minimum: Not specified

Precision: Not specified

Missing values:

NaN = Missing or Not Measured

CO2_f

Label: CO2_f

Definition: CO2 filtered

Type: Physical quantity

Unit: millimolePerMeterCubed

Maximum: Not specified

Minimum: Not specified

Precision: Not specified

Missing values:

NaN = Missing or Not Measured

CO2_gf

Label: CO2_gf

Definition: CO2 gap-filled

Type: Physical quantity

Unit: millimolePerMeterCubed

Maximum: Not specified

Minimum: Not specified

Precision: Not specified

Missing values:

NaN = Missing or Not Measured

rhoCp

Label: rhoCp

Definition: Specific heat capacity of air at given density

Type: Physical quantity

Unit: joulePerMeterCubedPerKelvin

Maximum: Not specified

Minimum: Not specified

Precision: Not specified

Missing values:

NaN = Missing or Not Measured

UST

Label: UST

Definition: Friction velocity

Type: Physical quantity

Unit: meterPerSecond

Maximum: Not specified

Minimum: Not specified

Precision: Not specified

Missing values:

NaN = Missing or Not Measured

H

Label: H

Definition: Sensible heat flux

Type: Physical quantity

Unit: wattPerMeterSquared

Maximum: Not specified

Minimum: Not specified

Precision: Not specified

Missing values:

NaN = Missing or Not Measured

UW

Label: UW

Definition: Covariance of horizontal and vertical wind speed

Type: Physical quantity

Unit: meterSquaredPerSecondSquared

Maximum: Not specified

Minimum: Not specified

Precision: Not specified

Missing values:

NaN = Missing or Not Measured

TAU

Label: TAU

Definition: Momentum flux

Type: Physical quantity

Unit: kilogramPerMeterSquaredPerSecond

Maximum: Not specified

Minimum: Not specified

Precision: Not specified

Missing values:

NaN = Missing or Not Measured

LE

Label: LE

Definition: Latent heat flux

Type: Physical quantity

Unit: wattPerMeterSquared

Maximum: Not specified

Minimum: Not specified

Precision: Not specified

Missing values:

NaN = Missing or Not Measured

FC

Label: FC

Definition: Flux of carbon dioxide

Type: Physical quantity

Unit: millimolePerMeterSquaredPerSecond

Maximum: Not specified

Minimum: Not specified

Precision: Not specified

Missing values:

NaN = Missing or Not Measured

ZoL

Label: ZoL

Definition: Zero plane displacement

Type: Physical quantity

Unit: meter

Maximum: Not specified

Minimum: Not specified

Precision: Not specified

Missing values:

NaN = Missing or Not Measured

UW_FreqR

Label: UW_FreqR

Definition: UW frequency response correction

Type: Physical quantity

Unit: dimensionless

Maximum: Not specified

Minimum: Not specified

Precision: Not specified

Missing values:

NaN = Missing or Not Measured

H_FreqResp

Label: H_FreqResp

Definition: H frequency response correction

Type: Physical quantity

Unit: dimensionless

Maximum: Not specified

Minimum: Not specified

Precision: Not specified

Missing values:

NaN = Missing or Not Measured

FCLE_FreqResp

Label: FCLE_FreqResp

Definition: Gas exchange frequency response correction

Type: Physical quantity

Unit: dimensionless

Maximum: Not specified

Minimum: Not specified

Precision: Not specified

Missing values:

NaN = Missing or Not Measured

UW_c

Label: UW_c

Definition: UW corrected with UW_FreqR

Type: Physical quantity

Unit: meterSquaredPerSecondSquared

Maximum: Not specified

Minimum: Not specified

Precision: Not specified

Missing values:

NaN = Missing or Not Measured

TAU_c

Label: TAU_c

Definition: TAU corrected with UW_FreqR

Type: Physical quantity

Unit: kilogramPerMeterSquaredPerSecond

Maximum: Not specified

Minimum: Not specified

Precision: Not specified

Missing values:

NaN = Missing or Not Measured

H_c

Label: H_c

Definition: H corrected with H_FreqResp

Type: Physical quantity

Unit: wattPerMeterSquared

Maximum: Not specified

Minimum: Not specified

Precision: Not specified

Missing values:

NaN = Missing or Not Measured

H_c_f

Label: H_c_f

Definition: H_c filtered

Type: Physical quantity

Unit: wattPerMeterSquared

Maximum: Not specified

Minimum: Not specified

Precision: Not specified

Missing values:

NaN = Missing or Not Measured

H_c_gf

Label: H_c_gf

Definition: H_c gap-filled

Type: Physical quantity

Unit: wattPerMeterSquared

Maximum: Not specified

Minimum: Not specified

Precision: Not specified

Missing values:

NaN = Missing or Not Measured

LE_c

Label: LE_c

Definition: LE corrected with FCLE_FreqResp

Type: Physical quantity

Unit: wattPerMeterSquared

Maximum: Not specified

Minimum: Not specified

Precision: Not specified

Missing values:

NaN = Missing or Not Measured

FC_c

Label: FC_c

Definition: FC corrected with FCLE_FreqResp

Type: Physical quantity

Unit: millimolePerMeterSquaredPerSecond

Maximum: Not specified

Minimum: Not specified

Precision: Not specified

Missing values:

NaN = Missing or Not Measured

WPL_LE

Label: WPL_LE

Definition: WPL correction for LE

Type: Physical quantity

Unit: wattPerMeterSquared

Maximum: Not specified

Minimum: Not specified

Precision: Not specified

Missing values:

NaN = Missing or Not Measured

LE_cw

Label: LE_cw

Definition: LE corrected with WPL_LE

Type: Physical quantity

Unit: wattPerMeterSquared

Maximum: Not specified

Minimum: Not specified

Precision: Not specified

Missing values:

NaN = Missing or Not Measured

LE_cw_f

Label: LE_cw_f

Definition: LE_cw filtered

Type: Physical quantity

Unit: wattPerMeterSquared

Maximum: Not specified

Minimum: Not specified

Precision: Not specified

Missing values:

NaN = Missing or Not Measured

LE_cw_gf

Label: LE_cw_gf

Definition: LE_cw gap-filled

Type: Physical quantity

Unit: wattPerMeterSquared

Maximum: Not specified

Minimum: Not specified

Precision: Not specified

Missing values:

NaN = Missing or Not Measured

WPL_FC

Label: WPL_FC

Definition: WPL correction for FC

Type: Physical quantity

Unit: millimolePerMeterSquaredPerSecond

Maximum: Not specified

Minimum: Not specified

Precision: Not specified

Missing values:

NaN = Missing or Not Measured

FC_cw

Label: FC_cw

Definition: FC corrected with WPL_FC

Type: Physical quantity

Unit: millimolePerMeterSquaredPerSecond

Maximum: Not specified

Minimum: Not specified

Precision: Not specified

Missing values:

NaN = Missing or Not Measured

FC_cw_f

Label: FC_cw_f

Definition: FC_cw filtered

Type: Physical quantity

Unit: millimolePerMeterSquaredPerSecond

Maximum: Not specified

Minimum: Not specified

Precision: Not specified

Missing values:

NaN = Missing or Not Measured

FC_cw_gf

Label: FC_cw_gf

Definition: FC_cw gap-filled

Type: Physical quantity

Unit: millimolePerMeterSquaredPerSecond

Maximum: Not specified

Minimum: Not specified

Precision: Not specified

Missing values:

NaN = Missing or Not Measured

FC_cwb_gf

Label: FC_cwb_gf

Definition: FC_cw with Burba correction

Type: Physical quantity

Unit: millimolePerMeterSquaredPerSecond

Maximum: Not specified

Minimum: Not specified

Precision: Not specified

Missing values:

NaN = Missing or Not Measured

FC_cwbu_gf

Label: FC_cwbu_gf

Definition: FC_cwb_gf with UST correction

Type: Physical quantity

Unit: millimolePerMeterSquaredPerSecond

Maximum: Not specified

Minimum: Not specified

Precision: Not specified

Missing values:

NaN = Missing or Not Measured

AUX_1

Label: AUX_1

Definition: Auxilliary channel

Type: Physical quantity

Unit: dimensionless

Maximum: Not specified

Minimum: Not specified

Precision: Not specified

Missing values:

NaN = Missing or Not Measured

AUX_2

Label: AUX_2

Definition: Auxilliary channel

Type: Physical quantity

Unit: dimensionless

Maximum: Not specified

Minimum: Not specified

Precision: Not specified

Missing values:

NaN = Missing or Not Measured

AUX_3

Label: AUX_3

Definition: Auxilliary channel

Type: Physical quantity

Unit: dimensionless

Maximum: Not specified

Minimum: Not specified

Precision: Not specified

Missing values:

NaN = Missing or Not Measured

AUX_4

Label: AUX_4

Definition: Auxilliary channel

Type: Physical quantity

Unit: dimensionless

Maximum: Not specified

Minimum: Not specified

Precision: Not specified

Missing values:

NaN = Missing or Not Measured

AUX_5

Label: AUX_5

Definition: Auxilliary channel

Type: Physical quantity

Unit: dimensionless

Maximum: Not specified

Minimum: Not specified

Precision: Not specified

Missing values:

NaN = Missing or Not Measured

AUX_6

Label: AUX_6

Definition: Auxilliary channel

Type: Physical quantity

Unit: dimensionless

Maximum: Not specified

Minimum: Not specified

Precision: Not specified

Missing values:

NaN = Missing or Not Measured

This material is based upon work supported by the National Science Foundation under Grants #DEB-1637459, 1026843, 9810222, 9211775, 8702328; #OPP-9911278, 9911681, 9732281, 9615411, 9615563, 9615942, 9615949, 9400722, 9415411, 9318529; #BSR 9019055, 8806635, 8507493. Any opinions, findings, conclusions, or recommendations expressed in the material are those of the author(s) and do not necessarily reflect the views of the National Science Foundation.